I am lucky that my early education was focused on reading and writing, and that I was a natural reader and writer at a young age. I believe that those who can write clearly are generally able to think clearly. Being a decent writer means you can summarize complex ideas with a small word-count. I'd suggest focusing on those basics first - being able to summarize complex ideas in a way that a child can understand.

After that, I gained experience breaking tasks into smaller actionable pieces and delegating the pieces to others. It's hard to say how you can learn to do this. I learned over a long period of time by living life. I did do sports, and I was in the military and learned a lot as an NCO.